void do_tests()
{
	string foo = read_bytes("/testfile");
	string mid = implode(explode(foo, "\n")[99..198], "\n") + "\n";

	ASSERT(!read_file("/single", 10, 10));
	ASSERT(read_file("/testfile") == foo);
	ASSERT(read_file("/testfile", 100, 100) == mid);
	ASSERT(!read_file("/does_not_exist"));
	ASSERT(!read_file("/testfile", 10000, 1));
}
